02:00-MP3 Grade 8 Comprehensive Science 3 Q4 Part B
Unit Test
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What role do glucose and oxygen play in cellular respiration?
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They are reactants because they are present before the reaction
They are reactants because they are present after the reaction,
They are products because they are present before the reaction,
They are products because they are present after the reaction.
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They are reactants because they present before the reaction. Hope this helps!

Explanation:

It took the corse

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .